function get(url,params,headers={}){
    const p=new Promise((resolve,reject)=>{
        const xhr=new XMLHttpRequest();
        let temp=[];
        for(let key in params){
            temp.push(`${key}=${params[key]}`)
        }
        xhr.open('get',`${url}?${temp.join('&')}`)
        xhr.onreadystatechange=()=>{
            if(xhr.readyState===4){
                if(xhr.status===200){
                    const res=JSON.parse(xhr.responseText);
                    resolve(res)
                }else{
                    reject(xhr.status)
                }
            }
        }
        xhr.setRequestHeader('content-type','application/x-www-form-urlencoded');
        for(let key in headers){
            xhr.setRequestHeader(key,headers[key]);
        }
        xhr.send();
    })
    return p
}

function post(url,params,headers={}){
    const p=new Promise((resolve,reject)=>{
        const xhr=new XMLHttpRequest();
        let temp=[];
        for(let key in params){
            temp.push(`${key}=${params[key]}`)
        }
        xhr.open('post',url)
        xhr.onreadystatechange=()=>{
            if(xhr.readyState===4){
                if(xhr.status===200){
                    const res=JSON.parse(xhr.responseText);
                    resolve(res)
                }else{
                    reject(xhr.status)
                }
            }
        }
        xhr.setRequestHeader('content-type','application/x-www-form-urlencoded');
        for(let key in headers){
            xhr.setRequestHeader(key,headers[key]);
        }
        xhr.send(temp.join('&'));
    })
    return p
}
